Creasing directly affects how a carton looks and folds. When the channel does not match the board, the fold may crack, the flap may not sit correctly or the box may lose its shape.
Gsm and thickness are not identical
Board gsm is useful, but it does not fully define folding behavior. Different boards with the same gsm can vary in thickness and grain response.
- Thickness is shared as well as gsm.
- Lamination or varnish is mentioned.
- A material sample is the safest reference.
Grain direction changes folding
Folds parallel and perpendicular to the grain behave differently. A mismatched crease can make small flaps hard to close.
- Mark critical flap dimensions.
- Fold direction is made clear in the drawing.
- Cracking risk on heavily printed areas is noted.
Channel width affects tolerance
A crease channel that is too narrow or too wide can create cracking, bulging or loose folding. This is reviewed before production.
- Channel choice is matched to board thickness.
- Critical bends are marked.
- Proofing needs are mentioned early.
How to describe creasing for a quote
Sending only the outer cut line is often not enough for carton jobs. Cut, crease and perforation lines are separated clearly.
- Different colors are used for crease lines.
- Folding points are dimensioned.
- Locking-flap areas are checked carefully.
Quote details we clarify together
When the file, material, quantity and deadline are clear, the quote conversation moves faster and with less back-and-forth.
- Current revision file
- Material and quantity details
- Critical dimensions or production notes
- Deadline expectation and delivery preference